Bug 895557, follow the spec when doing fragment navigation during page loads, r=bz

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extra : rebase_source : 4edc21fada3dd6a462522e8483191000b5ca1fd8
Bug 895557, follow the spec when doing fragment navigation during page loads, enable test

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extra : rebase_source : ed08041d6ff4b53da32d6a7a73fcc9ad7b5e8958